Device for fastening a turbocharger
A device for fastening a turbocharger to a base, with a fastening foot ( 12 ) which is integrally formed in one piece on a gas outlet casing ( 10 ) of the turbocharger and which has long holes ( 16 ) spaced from one another and preferably arranged in a star-shaped manner in relation to one another. In order to fasten the turbocharger, sliding shoes ( 26 ) are capable of being inserted into the long holes ( 16 ) and have continuous orifices, through which can be led fastening elements ( 30, 30 ′) capable of being fixed in the base.
1. A gas outlet casing of a turbocharger, comprising:
a fastening device for fastening the gas outlet casing to a base, the fastening device comprises a fastening foot integrally formed in one piece from the gas outlet casing, at least one sliding shoe and at least one fastening element, the fastening foot includes elongated holes which are spaced from one another and have longitudinal axes oriented in a star-shaped manner with a common center, each sliding shoe is capable of being inserted into a respective elongated hole, and each fastening element is capable of being fixed in the base and inserted through a continuous orifice in a respective sliding shoe;
wherein when the fastening foot heats up in relation to the base, expanding material of the fastening foot is movable, under each sliding shoe holding each respective fastening element, on the base.
2. The gas outlet casing of a turbocharger as claimed in claim 1 , wherein the common center of the longitudinal axes of the elongated holes which are arranged in a star-shaped manner is located below an axis of the turbocharger.
3. The gas outlet casing of a turbocharger as claimed in claim 1 , wherein the elongated holes are open toward the periphery of the fastening foot.
4. The gas outlet casing of a turbocharger as claimed in claim 3 , wherein, when the number of elongated holes is equal to 4, an angle α between the longitudinal axes oriented in a star-shaped manner amounts to about α=90°.
5. The gas outlet casing of a turbocharger as claimed in claim 1 , wherein the number of elongated holes is greater than or equal to 3.
6. The gas outlet casing of a turbocharger as claimed in claim 1 , wherein the ratio of length to total height of the sliding shoe is greater than or equal to 1.
7. The gas outlet casing of a turbocharger as claimed in claim 1 , wherein the sliding shoe has an essentially T-shaped cross section, a foot of the T-shaped sliding shoe filling the width of the elongated hole with play, and arms of the T-shaped sliding shoe projecting beyond edges of the elongated hole which face away from the base, when the sliding shoe is inserted into the elongated hole.
8. The gas outlet casing of a turbocharger as claimed in claim 7 , wherein the foot height of the foot of the T-shaped sliding shoe corresponds approximately to the hole height of the elongated hole.
9. The gas outlet casing of a turbocharger as claimed in claim 7 , wherein the arms of the T-shaped sliding shoe are designed elastically at least in the direction of the height.
10. The gas outlet casing of a turbocharger as claimed in claim 7 , wherein the arms of the T-shaped sliding shoe are segmented over the length of the sliding shoe by means of recesses and the individual segments are designed resiliently.
11. The gas outlet casing of a turbocharger as claimed in claim 7 , wherein the foot of the sliding shoe is essentially an insertion body and the arms of the T-shaped sliding shoe are formed essentially by a separate tension disk, there being provided in the insertion body and in the tension disk holes which are capable of being brought into congruence and which together form the orifice for receiving the fastening element.
12. The gas outlet casing of a turbocharger as claimed in claim 1 , wherein the sliding shoe has a plurality of continuous orifices for receiving fastening elements.